Alphabetical list of categories actually in use on the wiki, including those for which pages have not been created yet (i.e., "missing categories"). Alternatives to this list include searching the Category namespace using "Allpages" or "Prefixindex" (doesn't include missing categories), or browsing the category structure starting at the top (doesn't include categories that have not been themselves categorized).

Alphabetical list of all users who have ever registered. Includes users with no user page, those who have been banned, etc. Can be narrowed down to bots, sysops (administrators) or bureaucrats using a drop-down menu.

Not for searching the wiki, but for finding books for purchase by their ISBN. This is used in conjunction with the automatic linking of ISBNs by the MediaWiki software. This special page can also be linked to explicitly by appending the ISBN after a forward slash.